Haydn

MESSENGER image, from second flyby of Mercury in October 2008
Feature type	Impact crater
Location	Discovery quadrangle, Mercury
Coordinates	27°13′S 71°38′W / 27.22°S 71.64°W / -27.22; -71.64
Diameter	251 km (156 mi)
Eponym	Joseph Haydn

Haydn is a crater on Mercury. It has a diameter of 251 kilometers.^[1] Its name was adopted by the International Astronomical Union (IAU) in 1976. Haydn is named for the Austrian composer Joseph Haydn, who lived from 1732 to 1809.^[2]

Haydn is south of the larger basin Raphael.

• 
  Another oblique view from MESSENGER with Haydn at right
• 
  Raphael crater (top) and Haydn crater (bottom) in approximate color